Historian. Photocopies of correspondence, reports, and news articles (1889–1955) by Chapman regarding the history of Oklahoma Territory, including Lincoln County, the towns of Chandler, Mountain View, and Stillwater, and the Boomers led by David L. Payne. The collection also contains material relating to Oklahoma State University and the loyalty oaths required of the state’s college and university faculties during the early 1950s. Also included is a proclamation (1923) by Governor J. C. Walton declaring martial law in Okmulgee County, Oklahoma.